?Fuel Starvation

[Frederick W.]

68 327/300.
My engine falls flat beginning around 4500 rpm, feels like fuel starvation.
My carb was recently rebuilt and double checked, float level fine, in carb filter removed.
I've run my fuel lines visually from tank to carb. The only area suspicious to me is the rubber hose connecting the supply line from the steel line to the fuel pump. It looks unusually long and makes a big S shape. At the apex of the S curves there is slight "kinking" where there is a slight angular bend where the hose can't maintain the curve. It is very slight, but perhaps at speed it is "Sucking closed" or otherwise restricting flow.
Here are some pics. The light is shining on the fuel pump which has glare on th pic. Notice the big S hose.
Is this correct?
Any others with 68s (or 69s) able to check there hoses for similarity?





thanks
Fred

[Edward J.]

Re: ?Fuel Starvation

Fred, the factory fuel hose is a S shaped hose, and they can be had at most of the corvette venders, any kinks in the hose will cause a problem with fuel starvation problem at higher rpms, Or even a long hard pull.( higher RPMS).

[Frederick W.]

Re: ?Fuel Starvation

Fred, the factory fuel hose is a S shaped hose, and they can be had at most of the corvette venders, any kinks in the hose will cause a problem with fuel starvation problem at higher rpms, Or even a long hard pull.( higher RPMS).

Thanks Edward,
I replaced the coil today and found the wire on the negative terminal was barely holding together by a few strands. I fixed that while replacing the coil, and also tried to smooth the kink out of the rubber hose by hand.
Took it out and didn't get the problem. Maybe its fixed, but this gremlin has come and gone before.

Fred

[Jim L.]

Re: ?Fuel Starvation

That fuel line kink you had can definitely result in fuel starvation. If the problem comes back, or if you want to prevent its recurrence, slide a length of coiled spring stock inside the flex hose, similar to the coiled spring in the lower radiator hose. This will cure the problem.

Jim